If a person wanted to run Tomcat as the Dspace user, would it be enough to change the group for /usr/share/tomcat7 and to change the TOMCAT_USER in /etc/tomcat7/tomcat7.conf?

I know this might vary from system to system due to different installation methods and Tomcat packages, but I figured I’d ask for a more authoritative answer than I can get from trawling the web or guessing myself.